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Abstract:

A flow injection system coupled to a photodiode array spectrophotometer (FI-PDA) for the multicomponent kinetic determination of Cu, Zn, Co, Ni and Fe at trace levels is presented. The substitution reaction of metal-nitrilotriacetic complexes (M-NTA) by 4-(2-pyridilazo) resorcinol (PAR) instead of the direct complexation of the free ions with PAR is employed. In this way, the spectral differences between the colored complexes are combined with the different reaction rates of the ions producing a more specific λ-time region for each metal enhancing the selectivity. Since the NTA-M-PAR system is fast and the pure analyte profiles appear partially overlapped in the time and λ-axis, temporal and spectral information were added to PLS and PCR models to improve results and to increase the number of metals to be determined. The developed method provides the fast and cheap determination of the five metals at the sub-ppm range and demonstrates that the use of temporal and spectral information increases the number of analytes to be simultaneously determined, improving the analytical figures of merit as well. © 2001 Elsevier Science B.V.

Registro:

Documento: Artículo
Título:Multicomponent kinetic determination of Cu, Zn, Co, Ni and Fe at trace levels by first and second order multivariate calibration
Autor:Fernández, F.M.; Tudino, M.B.; Troccoli, O.E.
Filiación:Laboratorio De Análisis De Trazas, Departamento De Quimica Inorganica, Analitica Y Quimica Fisica/INQUIMAE, Facultad De Ciencias Exactas Y Naturales, Capital Federal, Argentina
Palabras clave:Co; Cu; Fe; Figures of merit; Flow injection; Multicomponent kinetic determination; Multivariate calibration; Ni; PAR; Zn; cobalt; copper; iron; metal; nickel; nitrilotriacetic acid; resorcinol; zinc; article; calibration; chemical reaction; complex formation; flow injection analysis; flow kinetics; multivariate analysis; priority journal; reaction analysis; reaction time; spectrophotometry; Rickettsia sp. PAR
Año:2001
Volumen:433
Número:1
Página de inicio:119
Página de fin:133
DOI: http://dx.doi.org/10.1016/S0003-2670(00)01380-5
Título revista:Analytica Chimica Acta
Título revista abreviado:Anal. Chim. Acta
ISSN:00032670
CODEN:ACACA
CAS:cobalt, 7440-48-4; copper, 15158-11-9, 7440-50-8; iron, 14093-02-8, 53858-86-9, 7439-89-6; nickel, 7440-02-0; nitrilotriacetic acid, 139-13-9, 28528-44-1; resorcinol, 108-46-3; zinc, 7440-66-6, 14378-32-6
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00032670_v433_n1_p119_Fernandez

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Citas:

---------- APA ----------
Fernández, F.M., Tudino, M.B. & Troccoli, O.E. (2001) . Multicomponent kinetic determination of Cu, Zn, Co, Ni and Fe at trace levels by first and second order multivariate calibration. Analytica Chimica Acta, 433(1), 119-133.
http://dx.doi.org/10.1016/S0003-2670(00)01380-5
---------- CHICAGO ----------
Fernández, F.M., Tudino, M.B., Troccoli, O.E. "Multicomponent kinetic determination of Cu, Zn, Co, Ni and Fe at trace levels by first and second order multivariate calibration" . Analytica Chimica Acta 433, no. 1 (2001) : 119-133.
http://dx.doi.org/10.1016/S0003-2670(00)01380-5
---------- MLA ----------
Fernández, F.M., Tudino, M.B., Troccoli, O.E. "Multicomponent kinetic determination of Cu, Zn, Co, Ni and Fe at trace levels by first and second order multivariate calibration" . Analytica Chimica Acta, vol. 433, no. 1, 2001, pp. 119-133.
http://dx.doi.org/10.1016/S0003-2670(00)01380-5
---------- VANCOUVER ----------
Fernández, F.M., Tudino, M.B., Troccoli, O.E. Multicomponent kinetic determination of Cu, Zn, Co, Ni and Fe at trace levels by first and second order multivariate calibration. Anal. Chim. Acta. 2001;433(1):119-133.
http://dx.doi.org/10.1016/S0003-2670(00)01380-5